# HG changeset patch
# User Jordi Gutiérrez Hermoso <jordigh@octave.org>
# Date 1570022151 14400
# Node ID 1117edef8b2b29744ea1293611c2a76adb7a9e35
# Parent  a74c65cd0ce35e3aff1400242abb08fac1d6fc7a
NES_ROM: new `from_json` and `to_json` methods

To allow saving/loading the ROM status.

diff --git a/nes.py b/nes.py
--- a/nes.py
+++ b/nes.py
@@ -1,3 +1,4 @@
+import json
 from zipfile import ZipFile, BadZipFile
 
 from PyQt5 import QtGui as QG
@@ -102,6 +103,24 @@
         self.rotate_tile_data(-1)
         self.update_tiles()
 
+    def to_json(self):
+        data = {
+            "initial_position": self.initial_position,
+            "filename": self.filename,
+            "tile_palettes": [tile.palette for tile in self.tiles],
+        }
+
+        return json.dumps(data)
+
+    @classmethod
+    def from_json(cls, data):
+        data = json.loads(data)
+        filename = data['filename']
+        palettes = data['tile_palettes']
+        initial_position = data['initial_position']
+
+        return cls(filename=filename, palettes=palettes, initial_position=initial_position)
+
 
 class Tile(object):
     """